67543661712 has 160 divisors (see below), whose sum is σ = 184216780800. Its totient is φ = 21283637760.

The previous prime is 67543661663. The next prime is 67543661737. The reversal of 67543661712 is 21716634576.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43603914 + ... + 43605462.

It is an arithmetic number, because the mean of its divisors is an integer number (1151354880).

Almost surely, 2^67543661712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 67543661712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92108390400).

67543661712 is an abundant number, since it is smaller than the sum of its proper divisors (116673119088).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

67543661712 is a wasteful number, since it uses less digits than its factorization.

67543661712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2021 (or 2015 counting only the distinct ones).

The product of its digits is 1270080, while the sum is 48.

The spelling of 67543661712 in words is "sixty-seven billion, five hundred forty-three million, six hundred sixty-one thousand, seven hundred twelve".